I muss say I am a bit lost here.
I think that by far the most likely scenario is these “UFOs” are some kinds of balloons, which are being exploited by many countries in many ways for decades - basically routine non event. The question being: why now - aka what is “new” that all the sudden the USAF is shooting them down left, right and center ?
Now, obviously, if those are NOT balloons things are getting much, much more interesting !